package com.skivingcloud.admin.conf;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.deser.std.StringDeserializer;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import org.apache.commons.lang3.StringUtils;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

/**
 * Jackson2ObjectMapperBuilderCustomizer
 * Java8序列化时间处理器配置
 * @author hushouquan
 */
@Configuration
public class LocalDateTimeSerializerConfig{
    private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss");
    
    @Bean
    @Primary
    public ObjectMapper serializingObjectMapper() {
        JavaTimeModule module = new JavaTimeModule();
        LocalDateTimeDeserializer dateTimeDeserializer = new LocalDateTimeDeserializer(DATE_TIME_FORMATTER);
        LocalDateTimeSerializer dateTimeSerializer = new LocalDateTimeSerializer(DATE_TIME_FORMATTER);
        module.addDeserializer(LocalDateTime.class, dateTimeDeserializer);
        module.addSerializer(LocalDateTime.class, dateTimeSerializer);
        LocalDateDeserializer localDateDeserializer = new LocalDateDeserializer(DATE_FORMATTER);
        LocalDateSerializer localDateSerializer = new LocalDateSerializer(DATE_FORMATTER);
        module.addDeserializer(LocalDate.class, localDateDeserializer);
        module.addSerializer(LocalDate.class, localDateSerializer);
        LocalTimeDeserializer localTimeDeserializer = new LocalTimeDeserializer(TIME_FORMATTER);
        LocalTimeSerializer localTimeSerializer = new LocalTimeSerializer(TIME_FORMATTER);
        module.addDeserializer(LocalTime.class, localTimeDeserializer);
        module.addSerializer(LocalTime.class, localTimeSerializer);
        //空串反序列化为null
        module.addDeserializer(String.class, new StdDeserializer<>(String.class) {
            @Override
            public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException{
                String result = StringDeserializer.instance.deserialize(p, ctxt);
                if (StringUtils.isEmpty(result)) {
                    return null;
                }
                return result;
            }
        });
        return Jackson2ObjectMapperBuilder.json().modules(module)
                .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS).build();
    }
}
